Her name is Emi Sunshine and she's just the sweetest thing this side of the Mississippi. Here she is performing Johnny Cash's "Folsom Prison Blues" at Market Square in Knoxville TN. She's also known to perform her brand of Country Blues at Sweetwater Flea Market in Sweetwater, TN.
On her Facebook page she identifies herself thusly: "Hi, my name's EmiSunshine and I'm a singer." I think I've found my son's future wife.